The file is located at $VIMRUNTIME/colors/slate.vim
which you can view by typing
:e $VIMRUNTIME/colors/slate.vim
from within vim. Most likely the file will be read only which is good. You DO NOT want to modify files that are installed by vim because the changes will be overridden. Save the color scheme to ~/.vim/colors/slate-mine.vim
with :w
and modify this copied colorscheme and then call it with
colorscheme slate-mine
Use whatever name you want to. You will need to create ~/.vim/colors
if it does not exist before hand.